The Washer,convex, cataloged under National Stock Number 5310-00-959-1029, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-959-1029 |
| Primary Part Number | 610211 |
| Item Name | Washer,convex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Style Designator | CONVEX |
| Material Document and Classification | MIL-S-7720,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.250 INCHES NOMINAL IN |
| Material Thickness | 0.050 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 303 OVERALL |
| Hole Diameter | 0.124 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 610211 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
NSN 5310-00-959-1029 is a Washer,convex, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-959-1029 has 1 manufacturer part number on file: 610211 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
3 possible matches (shared part number, not a government interchangeability claim): 5330-01-134-5633, 7045-01-462-6949, 6240-01-667-9395. Verify interchangeability with system specifications before substitution.
Key specifications for 610211: Style Designator: CONVEX; Material Document and Classification: MIL-S-7720,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.250 INCHES NOMINAL IN; Material Thickness: 0.050 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.